Update docs/blog/_posts/2020-12-18-scala3-m3.md

Co-authored-by: Sébastien Doeraene <[email protected]>

Author: anatoliykmetyuk

docs/blog/_posts/2020-12-18-scala3-m3.md

@@ -112,7 +112,7 @@ class Object extends Any, Matchable
 
 `Matchable` is currently a marker trait without any methods. Over time, we intend to migrate the methods `getClass` and `isInstanceOf` to it, since these are closely related to pattern-matching.
 
-With the addition of this type, we now make the compiler emit warnings when trying to do a trick like the one discussed above:
+In the meantime, the compiler will emit warnings when trying to call those methods, or when performing a `match`, on an value that is not a `Matchable`. For example, the above example is now flagged:
 
 ```scala
 -- Warning: i7314.scala:6:12 ---------------------------------------------------